Two Days Ago i was encrypting my external hard disk with bit locker, but accidentaly i remove the cable of my hard disk that time its was 24% completed, now when ever i put again my hard disk its ask for password but after that just blinking, i dont know what going on i have really really important data on it and it want to recover that data, please can any body tell me what should it do, please help me thanks

Hi, I can fully understand your frustrated. Based on the current situation, you need to use the BitLocker Repair Tool to Recover a Drive http://technet.microsoft.com/en-us/library/ee523219(WS.10).aspx If the issue persists, you can try the following commands in an elevated commend prompt. manage-bde F: -unlock (change the driver letter to the corresponding one, press Enter) For more information, you can refer to: http://technet.microsoft.com/en-us/library/dd875513(WS.10).aspx#BKMK_unlockNiki Han TechNet Community Support